Blood alcohol content detection methods are as follows: 1, through the blood test detection, this method is more accurate and scientific, it can directly detect the content of alcohol in the blood, is a method commonly used in clinical medicine. 2, through the breath alcohol detector to check, this detection method is through the exhaled gas contains the alcohol content to convert the concentration of alcohol in the blood, which is often used in police or daily 3, take non-blood infrared detection method, this method is mainly through the use of infrared photography of alcohol in the blood, to indirectly infer the blood alcohol content. 4, sweat gland detection method, through the detection of sweat inside the alcohol content to convert the blood inside the alcohol concentration.